Manuals / Fluke / Home Audio / Stereo Amplifier

Fluke 5725A instruction manual Voltage Operate, 3-10

Models: 5725A

1 196

Download 196 pages 44.16 Kb

Page 56

Voltage Operate

5725A

Instruction Manual

Voltage Operate

NO OUTPUT

	CURRENT
	OUTPUT	VOLTAGE MODE
	HI	CURRENT MODE
	HI	5725A STANDBY
		5725A STANDBY
	11A
	MAX	FAULT
	LO	FAULT
	LO	OVERLOAD
	2OV	OVERLOAD
	PK	CABLE OFF
	MAX	CABLE OFF

				3-10.
				BOOST
				LIT
VOLTAGE	OUTPUT	SENSE
VOLTAGE	V Ω A	V Ω A		μ
OUTPUT			WIDEBAND	μ
OUTPUT	HI		HI
HERE
	LO		LO
	HI
	AUX	GUARD	GROUND	•
	CURRENT

				aq11i.eps
	Warning

Both the 5700A and 5725A can produce fatal voltages. boosted voltage operation produces high voltage at higher current levels than normally available from the 5700A. during voltage operation, the potential risk of injury or fatal accident is greater than during normal operation.

Voltage operate mode is when only the VOLTAGE MODE indicator is lit. In voltage operate mode, amplified voltage output is available at the 5700A binding posts. Voltage operate occurs if "5725A" is selected in a 5700A setup menu as the voltage amplifier, and the next two conditions are true:

∙An ac voltage 220V or above is showing on the 5700A Output Display with the OPERATE annunciator lit.

∙The BOOST indicator on the 5700A is lit.

Note

If condition 1 is true, the BOOST indicator can be toggled on and off by pressing the 5700A BOOST key. If the BOOST indicator is off, then the 5725A is in standby mode.

Note

Under certain settings of ac voltage, especially high voltage between 1 to 5 kHz, a whine from the 5725A is audible. This originates from the output transformer, and is normal.

3-12

Image 56

Fluke 5725A instruction manual Voltage Operate, 3-10

Contents

Amplifier 5725AInstruction Manual Page Table of Contents 5725A Theory of OperationCalibration and Verification 5725A Instruction ManualTitle List of TablesTable 5725A Instruction ManualTitle List of FiguresFigure Instruction Manual 5725Aviii Bescheinigung des Herstellers/Importeurs Interference InformationDeclaration of the Manufacturer or Importer Page OPERATOR SAFETY SUMMARY HIGH VOLTAGELETHAL VOLTAGE Terms in this ManualSymbols Marked on Equipment Power SourceUse the Proper Power Cord Use the Proper FuseSERVICING SAFETY SUMMANY FOR QUALIFIED SERVICE PERSONNEL ONLYDo Not Service Alone Use Care When Servicing With Power OnFIRST AID FOR ELECTRIC SHOCK Free the Victim From the Live ConductorGet Help Never Accept Ordinary and General Tests for DeathIntroduction and Specifications Chapter5725A Instruction ManualIntroduction Where to Go From Here How to Use the Manuals 5725A Instruction Manual5700A Operator Manual 5700A Operator Reference GuideSpecifications 5700A Service ManualIntroduction and Specifications SpecificationsDC Voltage Range Resolution ±5C from calibration temperatureAC Voltage 5725AInstruction Manual AC Voltage continued Introduction and SpecificationsSpecifications 5725A Instruction ManualAC Voltage continued Voltage RangeIntroduction and Specifications Specifications±5C from calibration temperatureNote TemperatureTwo-WireComp Four-WireFour-Wire 5725A Instruction ManualDC Current Introduction and SpecificationsSpecifications AC Current 5725AInstruction Manual AC Current continued Introduction and SpecificationsSpecifications Resolution Resolution5725A Instruction ManualIntroduction and Specifications SpecificationsGeneral Specifications Temperature performance: Operating: 0C to 50C5725A Instruction ManualInstallation Service InformationPlacement and Rack Mounting Connecting to the 5700A Calibrator5725A Instruction ManualIntroduction Unpacking and InspectionInstallation 5725A Instruction ManualTYPE VOLTAGE/CURRENTService Information Placement and Rack MountingCooling Considerations Service InformationConnecting to the 5700A Calibrator Figure 2-2.Correct Way to Dress Interface CableSelecting Line Voltage Selecting Line VoltageAccessing the Fuse wCautionConnecting to Line Power Connecting to Line Power5725A Instruction ManualOperating Notes Chapter5725A Instruction ManualIntroduction Operating NotesFront Panel Features Figure 3-1.Front Panel FeaturesPOWER 5725AA B C D E F G H Rear Panel FeaturesTable 3-1.Front Panel Features 5725A STANDBY IndicatorRear Panel Features Figure 3-2.Rear Panel Features5725A Instruction ManualA B C D E F G H I Table 3-2.Rear Panel FeaturesCALIBRATION Switch 5700A CALIBRATOR ConnectorTurning on the 5725A Amplifier Warm Up5725A Operating Functions and Modes StandbyVoltage Standby Current Standby 5725A Operating Functions and ModesVoltage Operate 3-10Conditions That Activate the 5725A Current Operate3-11 Conditions That Activate the 5725A 3-12Theory of Operation ChapterHigh Voltage Sense Assembly A6 High Voltage Amplifier A3High Voltage Heat Sink Assemblies High Voltage Amplifier FeedbackOverall Functional Description IntroductionInstruction Manual Figure 4-1.5725A Overall Block Diagram5725A 1100V AC Range Functional Description 11A Range Functional Description Operation in the 11A DC Range Operation in the 11A AC RangeVoltage and Current Standby Modes Voltage StandbyHow the 5700A and 5725A Communicate 4-10Description of the Out-GuardLines 5725A Side 4-11Description of the In-GuardLines 4-12Functional Summaries by Assembly 4-13Interconnect Assembly A1 Detailed Circuit Description4-14 4-15Power Supply Assembly A4 4-16High Voltage Supply Section 4-17ASSEMBLY REF DESSwitching Section 4-18Current-LimitSection 4-19System Supply Section 4-20Digital Assembly A5 Fan Supply Section4-21 4-22Figure 4-2.Digital Assembly Block Diagram Theory of OperationDetailed Circuit Description aq19f.epsEEROM 4-26Data Latch 4-27Power Up and Reset Circuitry Watchdog TimerCurrent Amplifier Assembly A2 Break-DetectCircuitryaq20f.eps 5725AInstruction Manual Error Amplifier Section 4-35Output Stage Section 4-36Monitor Section 4-37Control and Switching Section Power Supply Section4-38 4-39High Voltage Amplifier A3 4-40Input Amplifier 4-41aq22f.eps Theory of OperationDetailed Circuit Description Integrator 4-42Window Comparator 4-43Transconductance and Cascode Stage 4-45Midstage 4-46Autobias Current Source 4-49Autobias Sense Circuit 4-50Signal Transformers Temperature MonitoringHigh Voltage Amplifier Feedback 4-51High Voltage Sense Assembly A6 4-54aq21f.eps Theory of OperationDetailed Circuit Description Sense Amplifier Section 4-55±3.2V during calibration Analog Monitor Section 4-56SIGNAL STANDBY VOLTAGE LIMITS1Analog Input Switching Section Serial Interface/Guard Crossing Section4-57 4-58Control Section 4-59AC Line Voltage Selection Section 4-605725A Instruction ManualCalibration and Verification Chapter5725A Instruction ManualCalibration and Verification Where to Find Further InformationIntroduction 5725A Instruction ManualMaintenance Chapter5725A Instruction ManualReplacing the Fuse IntroductionCleaning the Air Filter General Cleaning General CleaningCleaning PCA’s Access Procedures Figure 6-3.Assembly Location DiagramA. TOP VIEW B. BOTTOM VIEWInitial Access Procedure wWarningHIGH VOLTAGE Accessing the Power Supply Assembly A4 Accessing the Digital Assembly A5WHEN REINSTALLING DIGITAL ASSEMBLY Figure 6-5.Accessing the Digital Assembly5725A Instruction ManualAccessing the Current Amplifier Assembly A2 6-10Figure 6-6.Correct Way to Dress Cables Accessing the High Voltage Amplifier A36-11 Accessing the High Voltage Sense Assembly A6 6-12Accessing the High Voltage Output Transistors Accessing the Interconnect Assembly A16-13 6-14Enabling Front or Rear Binding Posts 6-159.Reinstall the top cover Troubleshooting Chapter5725A Instruction ManualIntroduction 5725A Fault CodesSelf Diagnostics Table 7-1.5725A Fault Codes FAULT5725A Instruction Manual MESSAGESelf Diagnostics Table 7-1.5725A Fault Codes contFAULT MESSAGEManual Tests for Fault Isolation Manual Tests for Fault Isolation Table 7-2.Analog Monitor FaultsFAULT NO MESSAGEReduced-VoltageTroubleshooting Mode Problem 3: Fault When Entering Voltage OperateProblem 4: Fault When Entering Current Standby Problem 5 Fault When Entering Current OperateTesting the Power Supply By Itself Testing the Power Supply By Itself7-10 5725A Instruction ManualList of Replaceable Parts Chapter5725A Instruction ManualHow to Obtain Parts Manual Status InformationNewer Instruments IntroductionService Centers Assembly NameTable 8-1.Final Assembly 5725ATable 8-1.Final Assembly cont List of Replaceable Partsaq24f.tif Figure 8-1.Final Assembly5725A aq25f.tif Figure 8-1.Final Assembly contList of Replaceable Parts Figure 8-1.Final Assembly cont 5725AInstruction Manual aq26f.tifaq27f.tif Figure 8-1.Final Assembly contList of Replaceable Parts Figure 8-1.Final Assembly cont 5725AInstruction Manual aq28f.tifaq29f.tif Figure 8-1.Final Assembly contList of Replaceable Parts Figure 8-1.Final Assembly cont 5725AInstruction Manual aq30f.tifaq31f.tif Figure 8-1.Final Assembly contList of Replaceable Parts 5725A Table 8-2.A1 Interconnect PCAList of Replaceable Parts 5725A-1611Figure 8-2.A1 Interconnect PCA aq36f.epsTable 8-3.A2 Current Amplifier PCA 5725AInstruction Manual List of Replaceable Parts Table 8-3.A2 Current Amplifier PCA cont5725A Instruction ManualTable 8-3.A2 Current Amplifier PCA cont Reference Description DesignatorList of Replaceable Parts 5725A-1650Figure 8-3.A2 Current Amplifier PCA aq37f.epsTable 8-4.A3 High Voltage Amplifier PCA 5725AInstruction Manual Designator List of Replaceable PartsTable 8-4.A3 High Voltage Amplifier PCA cont 5725A Instruction ManualTable 8-4.A3 High Voltage Amplifier PCA cont R640,R642List of Replaceable Parts 5725A-1661Figure 8-4.A3 High Voltage Amplifier PCA aq38f.epsInstruction Manual Table 8-5.A4 Power Supply PCA5725A Table 8-5.A4 Power Supply PCA cont List of Replaceable PartsTable 8-5.A4 Power Supply PCA cont 5725AInstruction Manual R351 R355 R361,R362Figure 8-5.A4 Power Supply PCA List of Replaceable Parts5725A-1631 aq39f.epsTable 8-6.A5 Digital PCA 5725AInstruction Manual List of Replaceable Parts 5725A-1650Figure 8-6.A5 Digital PCA aq40f.eps5725A Table 8-7.A6 High Voltage Sense PCAList of Replaceable Parts Table 8-7.A6 High Voltage Sense PCA cont5725A Instruction ManualTable 8-7.A6 High Voltage Sense PCA cont R154 R155 R156,R158,R168 R173 R162 R171 R172,R175List of Replaceable Parts 5725A-1601Figure 8-7.A6 High Voltage Sense PCA aq41f.epsInstruction Manual Table 8-8.A12 Transformer Enclosure Assembly5725A aq32f.tif Figure 8-8.A12 Transformer Enclosure AssemblyList of Replaceable Parts 5725A aq33f.tifList of Replaceable Parts aq34f.tifaq35f.tif 5725AInstruction Manual List of Replaceable Parts Table 8-9.A30 Inductor PCA5725A-1603 Figure 8-9.A30 Inductor PCA5725A Schematic Diagrams Chapter5725A Instruction ManualSchematic Diagrams 5725A-1611Figure 9-1.A1 Interconnect PCA aq48f.epsFigure 9-1.A1 Interconnect PCA cont 5725AInstruction Manual Schematic Diagrams Figure 9-1.A1 Interconnect PCA cont5725A Instruction ManualFigure 9-2.A2 Current Amplifier PCA 5725A-1650Schematic Diagrams Figure 9-2.A2 Current Amplifier PCA contFigure 9-2.A2 Current Amplifier PCA cont 5725AInstruction Manual Schematic Diagrams Figure 9-2.A2 Current Amplifier PCA cont5725A Instruction ManualFigure 9-3.A3 High Voltage Amplifier PCA 5725A-1661Schematic Diagrams Figure 9-3.A3 High Voltage Amplifier PCA contFigure 9-3.A3 High Voltage Amplifier PCA cont 5725AInstruction Manual aq59f.eps Schematic DiagramsFigure 9-4.A4 Power Supply PCA Figure 9-4.A4 Power Supply PCA cont 5725ASchematic Diagrams Figure 9-4.A4 Power Supply PCA contAT PINS 12 AND 13 OF U507 5725AInstruction Manual TYPICAL COMMUNICATIONS ACTIVITYSchematic Diagrams Figure 9-5.A5 Digital PCA cont5725A Instruction ManualSTANDBY VOLTAGE STANDBYSchematic Diagrams Figure 9-6.A6 High Voltage Sense PCA contFigure 9-6.A6 High Voltage Sense PCA cont 5725AInstruction Manual Schematic Diagrams Figure 9-6.A6 High Voltage Sense PCA contFigure 9-6.A6 High Voltage Sense PCA cont 5725AInstruction Manual aq45f.eps Schematic DiagramsFigure 9-7.A12 Transformer Enclosure Assembly 5725A Instruction ManualIndex 5725A Page 5725A Instruction ManualManual Supplement Change #1 rear